[JAR0023]

Only way to know without a doubt what chip is in your car is to pull the DME and open it up.

One thing that helped me wrap my head around setting idle has already been mentioned. You are not so much adjusting the idle up and down (though you can) as getting the throttle body and DME in sync. The DME knows where it wants to idle. You can adjust up or down but you are making the ICV work to do this and it can have unintended affects if you get too far out of range.

I can't remember if I picked it up here or in the Bentley, likely here. Once you set your idle and pull the jumper there shouldn't be a change in idle if you have it correct. This makes sense since jumpering the ICV sets it to the middle of its range. I just went through and corrected some small vacuum leaks and had to reset my idle. FWIW my 86 is happiest with idle set at 780 rpm and it is rock solid there. If I try to bring it up to 800 or more I get a sporadic idle bounce on cold days as the car warms up.

-J